745488381 has 48 divisors (see below), whose sum is σ = 1123303104. Its totient is φ = 439296000.

The previous prime is 745488379. The next prime is 745488383. The reversal of 745488381 is 183884547.

It is an interprime number because it is at equal distance from previous prime (745488379) and next prime (745488383).

It is not a de Polignac number, because 745488381 - 2¹ = 745488379 is a prime.

It is a super-2 number, since 2×745488381² = 1111505852412002322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 745488381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745488383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2900605 + ... + 2900861.

It is an arithmetic number, because the mean of its divisors is an integer number (23402148).

Almost surely, 2^745488381 is an apocalyptic number.

It is an amenable number.

745488381 is a deficient number, since it is larger than the sum of its proper divisors (377814723).

745488381 is a wasteful number, since it uses less digits than its factorization.

745488381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 463 counting only the distinct ones).

The product of its digits is 860160, while the sum is 48.

The square root of 745488381 is about 27303.6331098995. The cubic root of 745488381 is about 906.7348187278.

The spelling of 745488381 in words is "seven hundred forty-five million, four hundred eighty-eight thousand, three hundred eighty-one".